docs: def get_form_kwargs(self, **kwargs):
          ''' Tell the form which fields to render '''
          kwargs = super(ClassRegistrationView, self).get_form_kwargs(**kwargs)
          kwargs['user'] = self.request.user if hasattr(self.request,'user') else None
  
          listing = self.get_listing()
  
          kwargs.update({
              'openEvents': listing['openEvents'],
              'closedEvents': listing['closedEvents'],
          })
          return kwargs